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https://issues.apache.org/jira/browse/SPARK-12214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Naveen Pishe updated SPARK-12214:
---------------------------------
Description:
There is requirement to save "user-defined" Metadata as part of Sequence File
"Header" using Spark.
To write a User-defined metadata as part of Sequence File using regular Hadoop
API's I pass the metadata object to SequenceFile.Writer constructor which when
creates a SequenceFile ensures the metadata is part of the sequence file header.
Currently Spark's JavaPairRDD Api provides methods to save an RDD to an
SequenceFile format, but I don't see any API which can either give the
SequenceFile.writer or a method where in I can pass the user-defined metadata
so as to be written as part of sequence file header.
The enhancement request an API to implement the same
was:
There is requirement to save "user-defined" Metadata as part of Sequence File
"Header" using Spark.
To write a User-defined metadata as part of Sequence File using regular Hadoop
API's I pass the metadata object to SequenceFile.Writer constructor which when
creates a SequenceFile ensures the metadata is part of the sequence file header.
Currently Spark's JavaPairRDD Api provides methods to save an RDD to an
SequenceFile format, but I don't see any API which can either give the
SequenceFile.writer or a method where in I can pass the user-defined metadata
so as to be written as part of sequence file header.
The enhancement request an API to implement the same
Creating a Union of two RDD (header + data) and saving as Sequence file is not
a solution as its not a header. Is there any way I can achieve the same.
> Spark to provide an API to save user-defined metadata as part of Sequence
> File header
> -------------------------------------------------------------------------------------
>
> Key: SPARK-12214
> URL: https://issues.apache.org/jira/browse/SPARK-12214
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 1.3.0, 1.4.0, 1.5.0
> Reporter: Naveen Pishe
> Labels: Sequence, header, metadata, sequencefile
>
> There is requirement to save "user-defined" Metadata as part of Sequence File
> "Header" using Spark.
> To write a User-defined metadata as part of Sequence File using regular
> Hadoop API's I pass the metadata object to SequenceFile.Writer constructor
> which when creates a SequenceFile ensures the metadata is part of the
> sequence file header.
> Currently Spark's JavaPairRDD Api provides methods to save an RDD to an
> SequenceFile format, but I don't see any API which can either give the
> SequenceFile.writer or a method where in I can pass the user-defined metadata
> so as to be written as part of sequence file header.
> The enhancement request an API to implement the same
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